package org.foreningsgatan.modular.lightsources;

/**
 * Copyright (c) 2008 Joakim Back
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 * 
 * @author Joakim Back
 * 
 */
public class LightMap {
	private static RGB sNULL_RGB = new RGB(0.0f, 0.0f, 0.0f);

	private RGB[][] lights;

	private int offsetX = 0;

	private int offsetY = 0;

	private int size;

	public LightMap(int size) {
		this.size = size;

		this.lights = new RGB[size][size];
	}

	public RGB get(int x, int y) {
		x -= offsetX;
		y -= offsetY;

		if ((x < 0) || (x >= size) || (y < 0) || (y >= size)) {
			return sNULL_RGB;
		}

		return lights[x][y];
	}

	public void set(int x, int y, RGB rgb) {
		lights[x][y] = rgb;
	}

	public int getSize() {
		return size;
	}

	public void applyOffset(int offsetX, int offsetY) {
		this.offsetX = offsetX;
		this.offsetY = offsetY;
	}
}
